#include <iostream>
#include <list>

class Vector2d;


void main(){

}



class Vector2d {
private:
	float x,y;
	
public:
	Vector2d(){}
	Vector2d(float,float);
	Vector2d operator+(Vector2d);
	Vector2d operator-(Vector2d);
	Vector2d operator*(Vector2d);
};

//constructor
Vector2d::Vector2d(float _x,float _y){
	x = _x;
	y = _y;
}

//operator overloading
Vector2d Vector2d::operator+(Vector2d vec){ return Vector2d(x + vec.x, y + vec.y); }
Vector2d Vector2d::operator-(Vector2d vec){ return Vector2d(x - vec.x, y - vec.y); }
Vector2d Vector2d::operator*(Vector2d vec){ return Vector2d(x * vec.x, y * vec.y); }